1. Thực hiện phép tính a) 3³.2-3.4² b) 8/9-|-2020/2021|+(-1/3)² 24/07/2021 Bởi Ruby 1. Thực hiện phép tính a) 3³.2-3.4² b) 8/9-|-2020/2021|+(-1/3)²
`a) 3^3 . 2 – 3.4^2` `= 27.2 – 3.16` `= 54 – 48` `= 6` `b) 8/9 – |-2020/2021| + (-1/3)^2` `= 8\9 – 2020/2021 + 1/9` `= 1 – 2020/2021` `= 1/2021` Bình luận
`a) 3^3. 2 – 3. 4^2` `= 3^3. 2 – 3. (2^2)^2``= 3^3. 2 – 3. 2^4` `= 3. 2. (3^2 – 2^3)` `= 6. (9 – 8)` `= 6. 1` `= 6` `b) 8/9 – |-2020/2021| + (-1/3)^2` `= 8/9 – 2020/2021 + 1/9` `= (8/9 + 1/9) – 2020/2021` `= 1 – 2020/2021` `= 1/2021` Bình luận
`a) 3^3 . 2 – 3.4^2`
`= 27.2 – 3.16`
`= 54 – 48`
`= 6`
`b) 8/9 – |-2020/2021| + (-1/3)^2`
`= 8\9 – 2020/2021 + 1/9`
`= 1 – 2020/2021`
`= 1/2021`
`a) 3^3. 2 – 3. 4^2`
`= 3^3. 2 – 3. (2^2)^2`
`= 3^3. 2 – 3. 2^4`
`= 3. 2. (3^2 – 2^3)`
`= 6. (9 – 8)`
`= 6. 1`
`= 6`
`b) 8/9 – |-2020/2021| + (-1/3)^2`
`= 8/9 – 2020/2021 + 1/9`
`= (8/9 + 1/9) – 2020/2021`
`= 1 – 2020/2021`
`= 1/2021`